US3757706A - Method and apparatus for incinerating polluted liquids and mud - Google Patents

Method and apparatus for incinerating polluted liquids and mud Download PDF

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Publication number
US3757706A
US3757706A US3757706DA US3757706A US 3757706 A US3757706 A US 3757706A US 3757706D A US3757706D A US 3757706DA US 3757706 A US3757706 A US 3757706A
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United States
Prior art keywords
reaction chamber
section
cylindrical
chamber
polluted
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Expired - Lifetime
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English (en)
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J Pariel
G Robic
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Elf Union
Heurtey SA
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Elf Union
Heurtey SA
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
    • F23G7/001—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals for sludges or waste products from water treatment installations
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/06—Treatment of sludge; Devices therefor by oxidation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/40—Valorisation of by-products of wastewater, sewage or sludge processing

Definitions

  • the liquid to be destroyed is supplied directly into a burner flame, but this precludes a uniform temperature throughout the liquid, as a result of which the obtainment of the required temperature within the liquid, for destruction thereof, is by no means certain.
  • the present invention has for its object to overcome these drawbacks in prior art systems by permitting total and direct incineration of polluted liquids and muds.
  • One of these dispersion agents may contain polluting material in suspension, and more particularly solid materials and may possibly form a mud.
  • the constituent which is the liquid or gaseous fuel is designed to cause the dispersion of a slightly combustible or non-combustible polluted liquid.
  • the substance to be destroyed may alternatively be formed by the combustible part of the mixture and, if it is a substance very avid of oxygen, it is preferable to place it in the presence of another phase advantageously consisting of a liquid such as water, which in that case may perform the function of an oxidation reaction moderator designed to avoid the formation of explosive mixtures with the combustion-supporting oxygen.
  • the mixture obtained must invariably have a heating value sufficient to enable the required temperatures 'to be obtained in the reaction chamber.
  • a mixture may be obtained by any convenient means.
  • This mixture is sprayed into the reaction chamber and mixed with an oxidizer such as atmospheric air.
  • Any type of burner suitable for effecting these operations can be used for performing the above method, and it is preferable to select a burner that is capable on its own of effecting the mixing operations and of atomizing the mixture.
  • One exemplary way of performing the subject method of this invention includes the following steps Filtering, possibly crushing (or both) of the matter in suspension in the fluid or fluids to be treated.
  • Homogenization of the gaseous mass achieved thanks to recirculation motions produced in the chamber and causing gas to be recycled towards the injection orifice the recirculation is so devised that some of the gases undergoing reaction hug the walls and cause the latter to be raised to a temperature close to that of the gaseous mass, so that any still nondissociated droplets impinging upon the walls can, by virtue of the size of the chamber, benefit from a heat input that assists their entry into a mixed gasification and combustion reaction.
  • Thermal equilibrium in the reaction chamber is obtained by regulating the proportion of combustible substances contained in the mixture.
  • the present invention further relates to apparatus for performing the above-disclosed method.
  • FIGS. 1 to 3 are schematic sectional showings of three possible embodiments of combustion chambers and FIG. 4 is a schematic perspective showing of a set of multiple chambers.
  • the exemplary polluting agent destroying combustion chamber shown in FIG. 1 is associated, at its inlet side, to apparatus 1 for producing a pseudohomogeneous mixture of two non-miscible phases entering through conduits la and 1b provided wtih valves 1c and 1d for regulating the quantity of combustible substances in relation to other non-combustible or slightly combustible substances, in order to obtain the required temperature in the reaction chamber to be described hereinafter.
  • This apparatus may itself be preceded by crushing and/or screening means designed to reduce any solid matter passing therethrough to the required size.
  • a pulverizing system 2 which, in the event that pulverization is obtained by pneumatic means, comprises a pulverizing air inlet 2a and, in order to permit combustion, an inlet 2b for an oxidizer such as atmospheric air.
  • the mixing apparatus 1 and the pulverization and combustion system 2 can be associated with advantage to form a burner of a kind well known per se capable of effecting at one mixing, pulverization and combustion initiation.
  • the pulverization and combustion system in mounted in the front face of a reaction chamber 3 which is so devised as to cause a partial downstream-toupstream backflow of gaseous substances.
  • chamber 3 includes a cylindrical portion 4 the length and diameter of which lie in the ratio of at least 3:1, preferably between 3:1 and 4:1 and with advantage between 13:4 and 15:4.
  • This cylindrical portion 4 is connected to a downstream convergent section 5 the apex half-angle of which lies between 18 and 22.
  • This convergent section is succeeded by a cylindrical throat 6 provided with a partly obturating element 7 formed by a sliding plate which can be inserted to an adjustable extent into throat 6 and acts as a regulator of the negative pressure prevailing in the chamber, it being possible for such an element 7 to be positioned further downstream along the path of the smokes.
  • the injector-forming pulverization system is supported by the front face 8 within a refractory temperature-sustaining block 9 provided in said face, the internal profiling of said block enabling the flow characteristics at the entry of chamber 3 to be matched to the required recirculation.
  • the internal wall of the chamber is provided with a lining of refractory material 10 surrounded by a heat insulating liner 11, thereby to conserve an internal wall temperature close to that prevailing in the body of gas in reaction while at the same time maintaining the temperature of a metal jacket 12 above the dew-point of the injected liquids.
  • a metal jacket 12 may be further surrounded by a heat insulating layer 13. All these linings or layers surround the chamber, convergent section 5 and throat 6.
  • This reaction chamber proper can be completed by an expansion chamber 14 in which the smokes are suitably cooled and rid of part of the dust they entrain in a first dust collector 14a provided with a dust extraction lock 14b, provision being furthermore made at the exit end of chamber 14 for dust discharging and final trapping means (not shown), as well known per se.
  • chamber 3a may include a conical wall 15 which converges from end-section 8a toward cylindrical throat 6a, the ratio of the length of this conical chamber to its inlet section diameter being chosen equal to at least 3:1.
  • the remaining arrangements in respect of such a conical chamber are identical to those in FIG. 1.
  • the configuration of chamber 3b is such that it includes, starting from the inlet side, a conical wall which is succeeded by a cylindrical portion 4a and thereafter by a convergent section 5a and a cylindrical throat 6b, the dimensional requirements for the length of the chamber in relation to the diameter of its inlet section and for the apex halfangle of the convergent section remaining identical.
  • the same arrangements as for that in FIG. 1 are retained on both the inlet and discharge sides.
  • said wall could be provided with a broken surface such as by forming channels in the refractory material or by providing upstanding refractory stubs thereon, which may be fitted or not, or by providing similar means.
  • a central flux is surrounded by an annular vortex which is carried along by the central flux and causes a recirculating current to travel along the wall in an upstream direction.
  • annular vortex can be taken advantage of to effect at least one complementary counterstreamed injection immediately downstream of the annular recirculation vortex, and it is possible to introduce in such injection various substances which might be incompatible with those forming the main intake mixture.
  • Such complementary injection enables the constituents thereof to be raised to the reaction temperature more rapidly than those participating in the principal injection.
  • One of the two phases may be the one charged with the polluting substances to be destroyed. If this phase is the fuel, the other may consist of sufficiently pure wateror some other liquid used as a moderator independently of its mixing action.
  • Main chamber 16 terminates in a convergent section 17, as is also the case for each of the above-described individual chambers, said convergent section 17 having an apex half-angle lying between 18 and 22 and being extended by a cylindrical throat 18 provided with an obturating element (not shown) similar to obturator 7 but applying to all the cells 3c whereby to cause the required recycling to take place. Similar feed arrangements may be retained for all the burners of cells 3c or for said burners individually.
  • throat 18 is succeeded by an expansion chamber, and identical downstream installations are provided, suitably scaled to suit the flow resulting from the above arrangement of coupled burners.
  • one of the mixture constituents may include variously combined or assembled gaseous, liquid or solid substances. Muds are examples thereof, though dry solids in gases can be subjected to the above-disclosed methods of destroying polluting agents.
  • a method of destroying polluting agents contained in liquids or mude comprising the steps of producing a pseudo-homogeneous mixture in a state of fine division through the mutual dispersion of non-miscible phases of which at least one phase is polluted and at least one phase is combustible, pulverizing the mixture in a reaction chamber, gasifying and burning the pulverized misture in the reaction chamber, and recirculating the gaseous substances developed in said chamber in an annular vortex from the center line centrifugally towards the downstream region of said chamber in contact with the walls thereof and centrifugally from the walls to the center line of said chamber adjacent the zone of entry thereinto.
  • At least one liquid phase is formed by a polluted substance which is only slightly or non-combustible, and at least one other phase may be liquid or gaseous and polluted or non-polluted.
  • Apparatus for destroying polluting agents contained in liquids or muds comprising in combination mixing means for dispersing at least one liquid phase through at least one combustible phase and wherein at least one of said phases contains polluting agents, and producing a pseudo-homogeneous mixture, pulverizing means located downstream from said mixing means for forming a very large number of reaction media particles and enhance oxidation thereof, a recirculation type reaction chamber located downstream from said pulverizing means and an expansion chamber located beyond said reaction chamber.
  • reaction chamber wall includes a cylindrical portion the ratio of the length to the diameter of which is included substantially between 3:1 and 4:1, a convergent section having an apex half-angle of approximately 22, and a cylindrical outlet throat provided with a downstream partial throttling element.
  • reaction chamber comprises a wall which includes a conical convergent section the ratio of the length to inletsection diameter of which is at least 3:1 said conical convergent section being followed by a cylindrical wall provided with a partial throttling element.
  • the reaction chamber comprises a wall including an inlet section and which wall combines an initial conical convergent section with a cylindrical section downstream thereof, the combined conical section and cylindrical section having an overall length at least three times as great as the diameter of the inlet section, said cylindrical section being followed by a convergent section, the apex half-angle of which is between T8 and 22, and which convergent section is in turn followed by a cylindrical throat provided with a partial throttling element.
  • Apparatus according to claim 12 including means located on said reaction chamber for injecting a complementary mixture in a counterstream direction.
  • reaction chamber is multicellular and formed by a plurality of individual chambers .open at their outlet ends and the lengths of which are equal to at least twice their diameters, said plurality of chambers being disposed within and opening into a main homogenization chamber which may be cylindrical, conical or conical and cylindrical and which terminates in a convergent section having an apex half-angle of approximately 22, which convergent section is in turn followed by a cylindrical throat provided with partial throttling means and opening into an expansion chamber.
  • a main homogenization chamber which may be cylindrical, conical or conical and cylindrical and which terminates in a convergent section having an apex half-angle of approximately 22, which convergent section is in turn followed by a cylindrical throat provided with partial throttling means and opening into an expansion chamber.

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  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gasification And Melting Of Waste (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
US3757706D 1970-04-20 1971-04-12 Method and apparatus for incinerating polluted liquids and mud Expired - Lifetime US3757706A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7014159A FR2088628A5 (fr) 1970-04-20 1970-04-20

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US3757706A true US3757706A (en) 1973-09-11

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US3757706D Expired - Lifetime US3757706A (en) 1970-04-20 1971-04-12 Method and apparatus for incinerating polluted liquids and mud

Country Status (11)

Country Link
US (1) US3757706A (fr)
JP (1) JPS5024789B1 (fr)
BE (1) BE765524A (fr)
CA (1) CA940379A (fr)
CH (1) CH531681A (fr)
DE (1) DE2118073C3 (fr)
ES (1) ES390378A1 (fr)
FR (1) FR2088628A5 (fr)
GB (1) GB1349684A (fr)
NL (1) NL164947C (fr)
NO (1) NO131007C (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3838651A (en) * 1973-03-14 1974-10-01 R Dingwell Incinerators
US3894833A (en) * 1973-04-18 1975-07-15 Envirotech Corp Waste grease-burning system and apparatus
US3951581A (en) * 1972-06-22 1976-04-20 Mitsui Shipbuilding & Engineering Co., Ltd. Combustion method of paint waste disposal

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2316540A2 (fr) * 1975-02-28 1977-01-28 Heurtey Efflutherm Procede et dispositif d'evaporation et d'oxydation thermique d'effluents liquides et de dechets solides sous forme pulverulente
HU179510B (en) * 1978-10-04 1982-10-28 Magyar Asvanyolaj Es Foeldgaz Process for the thermic transformation of wastes in gaseous or liquid phase
FR2533018B1 (fr) * 1982-09-10 1985-07-19 Pariel Jean Marie Dispositif du type chaudiere utilisant comme combustible une suspension solide-liquide du type charbon-eau
DE3427719C2 (de) * 1984-07-27 1986-08-14 Horst P. Dr.-Ing. 8069 Gerolsbach Sauerwein Verbrennungsofen für hochgiftige Abfälle
US5018458A (en) * 1990-09-12 1991-05-28 Zimpro Passavant Environmental Systems, Inc. Furnace combustion zone temperature control method
DE19749688A1 (de) * 1997-11-10 1999-05-12 Gourmeli International N V Verfahren zur Verbrennung organischer Brennstoffe und Brenner hierfür
US8979525B2 (en) 1997-11-10 2015-03-17 Brambel Trading Internacional LDS Streamlined body and combustion apparatus

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3357375A (en) * 1965-08-17 1967-12-12 Prenco Mfg Company Incineration of industrial waste, and apparatus
US3395654A (en) * 1966-12-02 1968-08-06 Ritter Pfaudler Corp Reverse flow reactor and process
US3456603A (en) * 1967-10-24 1969-07-22 Arthur R Studler Retort incinerator
US3485566A (en) * 1966-04-15 1969-12-23 Fritz Schoppe Burner for firing a combustion chamber

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5037121B2 (fr) * 1972-06-15 1975-12-01

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3357375A (en) * 1965-08-17 1967-12-12 Prenco Mfg Company Incineration of industrial waste, and apparatus
US3485566A (en) * 1966-04-15 1969-12-23 Fritz Schoppe Burner for firing a combustion chamber
US3395654A (en) * 1966-12-02 1968-08-06 Ritter Pfaudler Corp Reverse flow reactor and process
US3456603A (en) * 1967-10-24 1969-07-22 Arthur R Studler Retort incinerator

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3951581A (en) * 1972-06-22 1976-04-20 Mitsui Shipbuilding & Engineering Co., Ltd. Combustion method of paint waste disposal
US3838651A (en) * 1973-03-14 1974-10-01 R Dingwell Incinerators
US3894833A (en) * 1973-04-18 1975-07-15 Envirotech Corp Waste grease-burning system and apparatus

Also Published As

Publication number Publication date
NO131007C (fr) 1975-03-19
NL7105233A (fr) 1971-10-22
GB1349684A (en) 1974-04-10
FR2088628A5 (fr) 1972-01-07
CA940379A (en) 1974-01-22
DE2118073B2 (de) 1977-11-24
NL164947B (nl) 1980-09-15
CH531681A (fr) 1972-12-15
NO131007B (fr) 1974-12-09
JPS5024789B1 (fr) 1975-08-19
DE2118073A1 (de) 1971-11-04
DE2118073C3 (de) 1979-07-26
ES390378A1 (es) 1973-06-01
NL164947C (nl) 1981-02-16
BE765524A (fr) 1971-08-30

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